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package fr.ign.calac.s_calac.controller;
import [...];
public class GenerateSampleServlet extends BaseHttpServlet {
private static final long serialVersionUID = -908918093488215264L;
/** The TransformerFactory used to create Transformer instances */
protected TransformerFactory transFactory;
/** The FopFactory used to create Fop instances */
protected FopFactory fopFactory = null;
/** URIResolver for use by this servlet */
protected transient URIResolver uriResolver;
@Override
public void init() throws ServletException {
this.uriResolver = new ServletContextURIResolver(getServletContext());
this.transFactory = TransformerFactory.newInstance();
this.transFactory.setURIResolver(this.uriResolver);
//Configure FopFactory as desired
// TODO: Double check this behaves properly!!
ResourceResolver resolver = new ResourceResolver() {
public OutputStream getOutputStream(URI uri) throws IOException {
URL url = getServletContext().getResource(uri.toASCIIString());
return url.openConnection().getOutputStream();
}
public Resource getResource(URI uri) throws IOException {
return new Resource(getServletContext().getResourceAsStream(uri.toASCIIString()));
}
};
FopFactoryBuilder builder = new FopFactoryBuilder(new File(".").toURI(), resolver);
configureFopFactory(builder);
fopFactory = builder.build();
}
/**
* This method is called right after the FopFactory is instantiated and can be overridden
* by subclasses to perform additional configuration.
*/
protected void configureFopFactory(FopFactoryBuilder builder) {
//Subclass and override this method to perform additional configuration
}
@Override
public void doGet( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException {
doPost(request, response);
}
@Override
public void doPost( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException {
//Get parameters
Map<String,String[]> params = request.getParameterMap();
// -> Ici je récupère mes paramètres de requête
File mapFile = File.createTempFile("mapfile", "");
// -> là je mets quelque chose dans mon mapFile
String path = "file:///" + mapFile.getAbsolutePath().replaceAll("\\\\", "/") + ".png";// -> j'ai vérifié en affichant ce chemin : il y a bien un image
try {
String xmlContent = "<?xml version=\"1.0\" encoding=\"iso-8859-1\"?><root><name>Machin</name>" +
"<friend><name>truc_1</name><phNo>" + "truc_2" + "</phNo></friend>" +
"<path>" + path + "</path>" +
"</root>";
String xsltParam = getServletContext().getRealPath(getServletConfig().getInitParameter("templatesDirectory") + "/test.xsl");
renderXML(xmlContent, xsltParam, response);
} catch (Exception ex) {
throw new ServletException(ex);
}
}
/**
* Converts a String parameter to a JAXP Source object.
* @param param a String parameter
* @return Source the generated Source object
*/
protected Source convertString2Source(String param) {
Source src;
try {
src = uriResolver.resolve(param, null);
} catch (TransformerException e) {
src = null;
}
if (src == null) {
src = new StreamSource(new File(param));
}
return src;
}
private void sendPDF(byte[] content, HttpServletResponse response) throws IOException {
response.setHeader("Content-Type", MimeConstants.MIME_PNG);
response.setHeader("Content-Length", String.valueOf(content.length));
response.setHeader("Content-Disposition", "inline; filename=\"test\"");
response.getOutputStream().write(content);
response.getOutputStream().flush();
}
/**
* Renders an XML file into a PDF file by applying a stylesheet
* that converts the XML to XSL-FO. The PDF is written to a byte array
* that is returned as the method's result.
* @param xml the XML file
* @param xslt the XSLT file
* @param response HTTP response object
* @throws FOPException If an error occurs during the rendering of the
* XSL-FO
* @throws TransformerException If an error occurs during XSL
* transformation
* @throws IOException In case of an I/O problem
*/
protected void renderXML(String xml, String xslt, HttpServletResponse response)
throws FOPException, TransformerException, IOException {
//Setup sources
//Source xmlSrc = convertString2Source(xml);
Source xmlSrc = new StreamSource(new StringReader(xml));
Source xsltSrc = convertString2Source(xslt);
//Setup the XSL transformation
Transformer transformer = this.transFactory.newTransformer(xsltSrc);
transformer.setURIResolver(this.uriResolver);
//Start transformation and rendering process
render(xmlSrc, transformer, response);
}
/**
* Renders an input file (XML or XSL-FO) into a PDF file. It uses the JAXP
* transformer given to optionally transform the input document to XSL-FO.
* The transformer may be an identity transformer in which case the input
* must already be XSL-FO. The PDF is written to a byte array that is
* returned as the method's result.
* @param src Input XML or XSL-FO
* @param transformer Transformer to use for optional transformation
* @param response HTTP response object
* @throws FOPException If an error occurs during the rendering of the
* XSL-FO
* @throws TransformerException If an error occurs during XSL
* transformation
* @throws IOException In case of an I/O problem
*/
protected void render(Source src, Transformer transformer, HttpServletResponse response)
throws FOPException, TransformerException, IOException {
FOUserAgent foUserAgent = getFOUserAgent();
//Setup output
ByteArrayOutputStream out = new ByteArrayOutputStream();
//Setup FOP
Fop fop = fopFactory.newFop(MimeConstants.MIME_PNG, foUserAgent, out);
//Make sure the XSL transformation's result is piped through to FOP
Result res = new SAXResult(fop.getDefaultHandler());
//Start the transformation and rendering process
transformer.transform(src, res);
//Return the result
sendPDF(out.toByteArray(), response);
}
/** @return a new FOUserAgent for FOP */
protected FOUserAgent getFOUserAgent() {
FOUserAgent userAgent = fopFactory.newFOUserAgent();
//Configure foUserAgent as desired
return userAgent;
}
} |
fo:external-graphic dans une servlet
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